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clk: Revert PDM clock initialization. #414

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Oct 28, 2024
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clk: Revert PDM clock initialization. #414

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114 changes: 1 addition & 113 deletions src/clk.c
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Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,7 @@
#include "types.h"
#include "utils.h"

#define CLK_ENABLE BIT(31)
#define CLK_MUX GENMASK(27, 24)
#define CLK_MUX GENMASK(27, 24)

#define NCO_BASE 5
#define NUM_NCOS 5
Expand Down Expand Up @@ -37,118 +36,7 @@ void clk_set_mca_muxes(void)
printf("CLK: Initialized %d MCA clock muxes\n", i);
}

struct soc_pdm_clk_data {
int soc;
uint64_t leap_pdm_feed_clkgates[10];
uint64_t pdm_pin_clkgates[10];
};

struct soc_pdm_clk_data pdm_clk_data_t8103 = {
.pdm_pin_clkgates =
{
0x23d240334,
0x23d240338,
0x23d24033c,
0x23d240340,
0x23d240344,
0x23d240348,
},
.leap_pdm_feed_clkgates =
{
0x23d24035c,
0x23d240360,
0x23d240364,
0x23d240368,
0x23d24036c,
0x23d240370,
},
};

struct soc_pdm_clk_data pdm_clk_data_t600x = {
.pdm_pin_clkgates =
{
0x292240348,
0x29224034c,
0x292240350,
0x292240354,
0x292240358,
0x29224035c,
},
.leap_pdm_feed_clkgates =
{
0x292240360,
0x292240364,
0x292240368,
0x29224036c,
0x292240370,
0x292240374,
},
};

struct soc_pdm_clk_data pdm_clk_data_t8110 = {
/* FILL ME: range 0x23d240300...0x23d24037c */
};

struct soc_pdm_clk_data pdm_clk_data_t602x = {
/* FILL ME: range 0x29e240300...0x29e240374 */
};

void clk_ungate_pdm_channels(struct soc_pdm_clk_data *data, int chanmask)
{
int nhits = 0;

for (int i = 0; chanmask >> i != 0; i += 1) {
if (chanmask & BIT(i)) {
mask32(data->pdm_pin_clkgates[i / 2], CLK_ENABLE, CLK_ENABLE);
mask32(data->leap_pdm_feed_clkgates[i / 2], CLK_ENABLE, CLK_ENABLE);
nhits++;
}
}

printf("CLK: Un-gated clocks of %d PDM channels\n", nhits);
}

void clk_set_pdm_gates(void)
{
int alc_node = adt_path_offset(adt, "/arm-io/alc0");

if (alc_node < 0) {
printf("CLK: Model has no internal microphones, skipping PDM clock init\n");
return;
}

/*
* We don't need to differentiate between machine models here since Apple
* seems to always use the same arrangement on all models with a given SoC.
*/
switch (chip_id) {
case T8103:
clk_ungate_pdm_channels(&pdm_clk_data_t8103, BIT(6) | BIT(7) | BIT(9));
break;

case T6000 ... T6002:
clk_ungate_pdm_channels(&pdm_clk_data_t600x, BIT(6) | BIT(7) | BIT(9));
break;

// TODO: missing clk_data for the SoCs below
#if 0
case T8110:
clk_ungate_pdm_channels(&pdm_clk_data_t8110, BIT(2) | BIT(3) | BIT(5));
break;

case T6020 ... T6021:
clk_ungate_pdm_channels(&pdm_clk_data_t602x, BIT(2) | BIT(3) | BIT(9));
break;
#endif

default:
printf("CLK: Missing SoC PDM clock data\n");
break;
}
}

void clk_init(void)
{
clk_set_mca_muxes();
clk_set_pdm_gates();
}
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